Taking into account its production volume for 2012, the replacement level of Gazprom Neft's category 2P hydrocarbon reserves was 438% including new acquisitions, or 230% excluding new acquisitions.

The main factors behind the growth of reserves in 2012 were the results of geological exploration, a reassessment of reserves at SeverEnergia's fields and license areas located in the Orenburg Region, as well as the acquisition of Gazprom Neft Novyy Port, which owns the license to the Novoportovskoye field.

"Gazprom Neft’s current reserves-to-production ratio PRMS demonstrate proven hydrocarbon reserves of more than 20 years. The increase in reserves is not only driven by the acquisition of new sites, but is also a result of active exploration. In particular, over the past year we have achieved good results through prospecting and exploration drilling, with a success rate of 83%. Going forward, the start of operations at our major new projects on the Yamal Peninsula, including the Novoportovskoye and Messoyakha projects, will make a significant contribution to our proven reserves base.”

Gazprom Neft's total reserves include the company's stake in the reserves of dependent companies, recorded on the basis of the Equity accounting method: the enterprises of Slavneft, Tomskneft, SalymPetroleum Development, SeverEnergia and Messoyakhaneftegaz.

For over 10 years Gazprom Neft's reserves have been audited according to the PRMS (Petroleum Resources Management System) standards of the Society of Petroleum Engineers.